When the Direction is Out or Return, the value contained by this property after the last row has been read from the result set by IDataReader will be information received from the data source. When the Direction is In, the value contained by this property will be sent as an argument to the data source before the IDataReader begins processing it's SQL command(s) or stored procedure.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2